Location of Phone?

Does anyone knows if there's an application for the Hero that allows you to actually see where a mobile is situated that calls you or sends you an sms/MMS ? or vice versa?
Friend of mine tells me he read about it but I wonder ...

Have a look at wavesecure. You can track your phones location via their web interface.

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I don't think this is what tobeonec meant. If I am correct, I think he/she is looking for something to track the person that called you.

If I am right, it is next to impossible unless the caller allows you to track them. To locate someone without their knowledge or consent is against the law, at least in the US. It is almost considered wire tapping.